Safety-razor motor and the like



Patented Feb. 7, 1922.

I I l I il ' UNITED STATES PATENT oFFICE.

CHARLES i. Madison, orl CHICAGO, ILLINOIS. y

i `SAFETY-nazeIt'Moron' AND THE' LIKE. l

To all whom t may concern.'

Be it known that I, CHARLES I.- MA'rsoN, a citizen of the UnitedStates, residing at Chicago, county of Cook,land State of'Illin'ois, have inventedAcertai-n new and useful VImprovements in Safety-Razor Motors and the li'lefofwhich'thefollowing is a specin fication. Y v

' The present vinvention has to do with improvements in momentum motors intended Vfor performing acertain class of work;and

more particularly relatesy to certain improvements in momentum motorsused for the operation of'an improved` type of safety razor. Y 1

The momentum 4Vmotor of the present in-` Vvention is especially intended for-the operation of--safety razors of the general.- type shownV in Letters Patent of the United 20 v December 26, 1916.y Inthe constructionfdis States No. 1,210,340, which was issued to me closed in the said LettersPatent, there is provided a relatively smallslitted tube having the edges of its 'slit sharpened, `with which tube thereV ccs-operates a rotatable vblade member yhaving sharpened edges which k(zo-operate with they edges of the slit to perform the cutting function by a shearing action. These two members are to be lrotated relatively Iwith respect to each other at a lcomparatively high speed, and the momentum motor-of the present invention is intended to performjthis class of work in particular. fl y In the use oflth'e type of safety razor above referred to the tubular member `is placed against the'surface of the skin with 'the-slit close to the surface and as the hairs enter theslit they are sheared off. In order to use this device to best advantage, it kis essential that it should besoshaped` that4 it can be readily` and conveniently ymoved "about Vover the skin of the user; and should therefore be provided with a handle or grip of convenient form for this purpose. lOne of the l'objects'of the present invention isto `provide ayhandle vor gripof Such'form that" it can ybe-very conveniently held and manipulated ;V which handlezo'r grip also vserves as a convenient 'member within which-"to place ythe operating parts .of the'V vmomentum motor.l

Another feature of the invention has reference to the provision of an arrangement whereby the fly-wheel of. the ymomentum ymotor may be readily broughtup to a high Y I Specification of Letters latent. v Patented Feb.

Application filed August 14, 1920. Serial Nol 403,522.

gearing, which gearingis the'n disengaged sothat during the shaving operation the motor will run very .smoothly and :without added vibration which would ordinarilybe of the' gears during the shaving operation will also reduce'thefriction so thatthe machine wll' continue 'to operate fora` much longer time than lwould otherwise be the case. l j 1 Other objects and uses of theinvention will appear from adetailed description of thesame which consists in the features 'of construction and combinations of hereinafter described and claimed. In'the drawings?4 z Figure 1 vshowsa.longitudinal section through-the momentum motor of the present parts speed ofv rotation by the use of suitable occasioned by. theoperation of gears during I the shaving operation. Y. This disengagement Y invent-ion showing Athe same vin its operative attachment to the safety razor itself; I v

` Fig. 2 shows a section taken on the line 2--2 of Fig. 1 looking in the direction of lthe arrows;

so l' Fig 3 shows a section taken on line .l l

3 3 of Fig'l looking infthe direction ofthe arrows;

Fig. 4 shows a longitudinal detailedsection through the safety razor element;- and through certain of the operating gears `of f the momentum motor.

The safety razor itself is designated` infits entirety by the numeral '6. It includes a tubular member7 having a longitudinally extending slit 8, the edges 9 and. 10 of which slit yare sharpened; vfand an .-interiorrrotary element 11 havinga series of transverseslits 12 Whose edges are sharpened and co-operate with the edges 9 a'nd 10inl the cuttingV function.'y vThis type of vconstruction -is .well illustrated yand 'set forth. in the aforesaid Letters Patent ofthe-'United States No.

walls or'caps17 Y and`1'8f are` provided ,for closing the twoy chamberfsaforesaid,

Fig. 5 shows an enlarged detailed section Y this specification 'with vamore :detailed de- Y the aliiisY ofthey flywheellshaft.

The `{1y-wheel 16 is provided with end bearings working in the partition 15 and end wall 17. One of these bearings 15% is connected to a flexible shaft 19 which shaft passes through Ya tubular member v.20y and is connected to the rotary cutting element 11.y

'It is observed in Figrl that'the tubular v .member 20 is bent near its outer end so that the safety razor elements lie .atY an angle to It is also observedi'i this connection that the slit 8 `of 'the safety razor lies substantially in the planewithin which the tubular support 20 f lies, sothat when the slit 8 is presentedV disaid s upport.

" rectly to the face of the user, thev momentum 4motor-itselfy is heldy away f'rm the face a distance dependingl upon Ythe angle of, bend of the tubular support 20 and the Vlength of This makes it very much easier. andinore convenientto operate the razor; and at the same timemakes it possible forthe user to accommodatethe ino-- mentum motor in the palm of his hand while grasping the tubular support Q0 `V`with his fingers 'during the shaving operation. j

N.Considering the construction of the momentum motor itself more in detail, the in- 'Anerb'earing :of theV flyjLwlieel 16v extends through the partition 15r andv carries a pinion 23. l Aj shaft 24 hav-ing an operating crank 25 is journaled in the partition 15 and in the end wall 18?, and said shaft 24 is per.- mitt'e'd ac'ertai'n amount of endwise Vmoviement. The iy-wheel 16 has a' circular recess '-26 for the' vaccornm'oda'tio'n`"of the inner end r 27 ofthe shaft "24 so that said shaft can be moved endwise through theV prescribed distance without interfering with the fly-wheel.

A gear 28 is secured` to the shaft 24v.Y asV 'shown in Fig. 5. Meshin'g with said gear' a pinion 29' journal'e'd on a pin .30 which pin jextends between the partition 15 and the fend `'iiall 18a; the pinion 29 is integral with .a gear 31 l'which ,reaches back adjacent to the inner surface of the gear"28- ,as 'shown in Fig. 5. f'Avpinion BQaI'id gear 33, are integrally formed and arej'ournaled 'on lthe shaft 24 so that they are free to rotatefthereon. Said )inio'n 32 meshes with 'the gear '3;1; and the o'lit'er face of the gear 33 vlies adjacent to the from said partition; and such movement will necessarily carry with it all ofthe other pinion and;

pushed inwardly, .the gears are moved against the tendency of such spring and the gear' 33 is brought into mesh with the pinion .23 .during operation of speeding 'up the fly-wheel. As soon as the handleis released, the gears automatically disengage leaving vthe* fly-wheel free to rotate withoutinteiference. 1

Reference to Fig. will disclose the presence of a slip coupling 'between the iiywheel 16 and therflexible shaft19. -Th'isrslip coupling razor shouldbecomejammedp `Iclaimchamber andhaving-lits shaft Yprojecting through the partition gintolthe other chambe'r-a pinion on theprojectingend of said .will permit the parts toslip, if nec- 7 ,essary,` in caser'the rotary "element of the shaft, a driving extension on the other Aend of said shaft, therebeing an annular recess" lin that side of the fly wheel adjacent the partition,l a

crank shaft ,-j ournalled: in the partition andthe other ,end i of theK-.cylin- V drical member, sa-idcrank shaft being free Yto move-axially ofiitsA length, andthe inner vend of the crank shaft bei-'ngv vaccomfmodated v with-inY the :recess of the. flyl wheel-,1, a main `gear secured t the crankshaft ladj acent' the end wall of the chamber, al pinion and gear rotatably mountedA onth'e crankshaft adjacent the said ma'ingear, a spring secured tothe partition and working against the .Inove 'the crankY shaft.V outwardly, other piiiivonand gear 'working in conjunction with? the firstmentioned gear and the pingearV aforesaid tending to Y and -an-v ion aforesaid, ,forjthe purpose of multiply' v ing speed of the pinion and gea-r,fwhereby when the crank shaft'fisl forced inwardly against the pressi'n'eI of the spring the gear fol the Vpinion and .gear isf caused to mesh with thepinion of the flywheel, and Where-V by when pressure-on the crarlrishaft is rei leasedvall-ofthe 'gearing is disengaged from the fly wheel.piniQmubSantially as de- 2. Aymomentum motor:for the j :iurpose specified comprising in combination acylindrieal chamber, a y wheel journalled in one end thereof-apinion secured tothe fly J wheel, -a longitudinally vmoi/'able crank shaftV journalledfadjacentl'theV inner of the the accommodation-ofthe VinnerV end of said crank `shaft,=a {gea-r secured to the crank shaft, a pinion and gear rotatably` mounted crankshaft and gear' Y y ilyfwheeh there-being acircular `recess .forj "ainerfaceof ,the gear 31 as is'clearly shown .inf Fig. 5.* A spri-r'ig '34 secured to'thepartitibn 15'pressfe`s against the inner face of the vgear "33 and tends Vto*I'rcw'e said gear.awayV A:on Ythe crank shaftA adjacent lsa-idf gear, I a Y spring working inconjunctiron with said, parts "tending, -tofmove the Y gears of' the train; dVfhen' the handle is:

wheel pinion, and means fory transmitting motion from the crank shaft gear to the pinion of the pinion and gear, whereby when the crank shaft is forced inwardly against the spring the gear of the pinion and gear is engaged with the fly Ywheel pinion, and whereby when the crank shaft 1s released said parts are disengaged, substantially as described.

3. A momentum motorfor the purpose specified comprising in combination a fly wheel, a pinion thereon, a longitudinally movable t crank shaft, a gear thereon, a spring working against said gear tending to move said ar and crank shaft away from the Hy w eel pinion, and means for driving the gear by the use of the crank shaft, whereby when the crank shaft is forced against the spring said gea-r is en gaged with the fiy wheel pinion, and whereby when the crank shaft is released the gear is disengaged from the fly wheel pinlon, by the sprin substantially as described.

RLES I. MATSON. 

